[Note from Steve: Wow! I just squeezed this in so that I didn’t have to add 2022 to the copyright statement! Happy New Year! Because this is yet another British-style mystery story, the metaphor of the title here refers to London’s Underground aka the Tube. Trains there, unlike NYC’s, actually have four rails with two live ones. The positive third rail is still outside the rails the car wheels ride on and has the higher voltage, which is twice the fourth with negative voltage, nestled between th...
Published on December 31, 2021 02:13